(19)

(11)

EP 1 275 223 A2

(12)

(88) Date of publication A3: 18.04.2002 (43) Date of publication: 15.01.2003 Bulletin 2003/03 (21) Application number: 01916997.8 (22) Date of filing: 14.02.2001

(51) International Patent Classification (IPC)7: H04L 12/28, H04L 12/56, H04L 1/18 (86) International application number: PCT/EP0101/736 (87) International publication number: WO 0105/9979 (16.08.2001 Gazette 2001/33)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 14.02.2000 EP 00200476 (71) Applicant: Thomson Licensing S.A. 92100 Boulogne-Billancourt (FR)	(72) Inventors: JEANNE, Ludovic,Thomson Multimedia 92648 Boulogne Cedex (FR) STRAUB, Gilles,Thomson multimedia 92648 Boulogne Cedex (FR) LOPEZ, Patrick,Thomson multimedia 92648 Boulogne Cedex (FR) (74) Representative: Kohrs, Martin et al Thomson multimedia46, quai A. Le Gallo 92648 Boulogne Cedex 92648 Boulogne Cedex (FR)